There's limited information on their website, but a post I read on Facebook stated it uses the exact same panel as the Gameboy Micro. So that's exciting. It looks to have a similar profile to the Gameboy Pocket, but smaller.

I do think I would buy this, if it had a cartridge slot and was in fact using the original micro screen. This design would be great, just a smaller version of the 101 but with a screen in the real 3:2 GBA format, not a stretched 4:3 or with black bars (for that I could just play on my DS Lite or smartphone).